53247213 has 20 divisors (see below), whose sum is σ = 84223260. Its totient is φ = 33409152.

The previous prime is 53247211. The next prime is 53247223. The reversal of 53247213 is 31274235.

It can be written as a sum of positive squares in 2 ways, for example, as 23794884 + 29452329 = 4878^2 + 5427^2 .

It is not a de Polignac number, because 53247213 - 2¹ = 53247211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53247211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17958 + ... + 20711.

It is an arithmetic number, because the mean of its divisors is an integer number (4211163).

Almost surely, 2^53247213 is an apocalyptic number.

It is an amenable number.

53247213 is a deficient number, since it is larger than the sum of its proper divisors (30976047).

53247213 is a wasteful number, since it uses less digits than its factorization.

53247213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38698 (or 38689 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 53247213 is about 7297.0687950711. The cubic root of 53247213 is about 376.2116965602.

The spelling of 53247213 in words is "fifty-three million, two hundred forty-seven thousand, two hundred thirteen".